Red Rock is in the Piggly Wiggly stores, but in cans and 2L. I stopped in Monteagle last year (Richie's Food Market) they had Southern Swirl and some of the other White Rock brands, maybe Kentucky Nip too. Sprechers root beer and other flavors were in Fayetteville. There are Sundrop bottlers (distributors) in Lawrenceburg, Pulaski and Tullahoma, plus Dr Pepper in McMinnville. I found glass bottles of Sundrop and Dr P from Big Springs (deli bottles) and West Jefferson (longnecks) in some of those areas.
There was a Double Cola distributor in Lafayette that carried Ski, Double Cola, Dad's, NuGrape and Jumbo. Probably these are all in cans from Cardinal Bev's now since Greensburg bottling closed.
90 years of Cheer...1917-2007